US7859192B2 - Method for operating high-pressure lamps without hotstarting and luminaire having two high-pressure discharge lamps - Google Patents

Method for operating high-pressure lamps without hotstarting and luminaire having two high-pressure discharge lamps Download PDF

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Publication number
US7859192B2
US7859192B2 US11/990,114 US99011406A US7859192B2 US 7859192 B2 US7859192 B2 US 7859192B2 US 99011406 A US99011406 A US 99011406A US 7859192 B2 US7859192 B2 US 7859192B2
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Prior art keywords
lamp
switched
luminaire
time
period
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US11/990,114
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US20090295308A1 (en
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Joachim Mühlschlegel
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Osram GmbH
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Osram GmbH
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Assigned to OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG reassignment OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG MERGER (SEE DOCUMENT FOR DETAILS). Assignors: PATENT-TREUHAND-GESELLSCHAFT FUER ELEKTRISCHE GLUEHLAMPEN MBH
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/46—Circuits providing for substitution in case of failure of the lamp
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention relates to a method for operating high-pressure lamps without hotstarting. It also relates to a luminaire or a pair of luminaires having two high-pressure discharge lamps in accordance with the precharacterizing clause of patent claim 10 .
  • High-pressure lamps are started at starting voltages of from 2 kV to 4 kV peak. If they are switched off in the hot state after a specific period of time of their operation and are then intended to be switched on again, a substantially higher starting voltage of from 10 kV to 30 kV is required (hot restarting).
  • the object of the present invention is to provide a method for operating high-pressure lamps which does not entail these additional costs and in which the problem of hotstarting can be circumvented. It should be possible for the high-pressure discharge lamps to be constructed in a manner which is as simple as possible without there being the problem of a wait of from 2 to 15 min for the recovery time of the lamp for renewed starting at the conventional starting voltage.
  • the invention provides a method as claimed in patent claim 1 .
  • a luminaire as claimed in the precharacterizing clause of patent claim 10 is developed by the characterizing features of patent claim 10 .
  • the method according to the invention is therefore a method for operating high-pressure discharge lamps without hotstarting, in which two high-pressure discharge lamps are provided in one luminaire.
  • the first lamp is switched off and the second lamp is set to be in a standby state for the period of time for the recovery of the first lamp or remains in such a state, in which it is not switched off.
  • the second lamp can assume the operating state without being started. If the luminaire is not switched on again, the second lamp can likewise be switched off once the period of time for the recovery of the first lamp has elapsed.
  • the invention uses the fact that the brightness of lamps is perceived logarithmically.
  • a single lamp is not perceived as being half as bright as two lamps, rather as being almost just as bright.
  • a single lamp is only perceived as being half as bright if, in terms of luminous efficiency, it is 20 dB lower.
  • a single lamp is, however, 3 dB lower than two lamps.
  • the invention uses this to provide a luminaire which has two high-pressure discharge lamps for illuminating an area.
  • the luminaire is regarded as being switched on at least in a preliminary stage when one of the lamps is illuminated.
  • the luminaire is considered to be switched off if only one of the lamps is switched off and the second is in the standby state.
  • the standby state can be defined as the lamp being operated normally. The user already perceives that the luminaire has responded to his switch-off operation when only one of the lamps is switched off.
  • the second lamp is preferably dimmed in the standby state such that it outputs less light and therefore, in the case of a lamp whose luminous efficiency has been dimmed to, for example, 50%, the entire luminaire outputs 75% less light in the switched-off state than in the switched-on state.
  • the lamp may also be operated in pulsed fashion in the standby state such that it outputs flickering light. As a result, it is made clear to the user that the luminaire has actually introduced the switch-off operation.
  • either the second lamp is still switched on to such an extent that it can assume the operating state again at any time without being restarted or the first lamp has already recovered and can be started at a conventional starting voltage of from 2 kV to 4 kV peak.
  • the second lamp can be operated at an increased power, with the result that it outputs more light, to be precise until the first lamp is started. It is therefore possible to compensate for absence of one lamp in the switched-on state.
  • a recovery phase begins for the second lamp. If, during this recovery phase for the second lamp, the luminaire is switched on again, only the first lamp is started and therefore switched on. Only once the period of time for the recovery of the second lamp has elapsed is the second lamp also started and therefore switched on. Once again, in this case, the luminaire is already regarded as being (preliminarily) switched on when only one of the two lamps of the luminaire is actually switched on. The second lamp then follows.
  • both lamps can be started simultaneously and therefore switched on when the luminaire is switched on.
  • one of the lamps is preferably boosted.
  • Boosting means that the lamp has more power applied to it, with the result that the mercury which is typically provided in a high-pressure discharge lamp reaches the vapor phase more rapidly in this lamp, the plasma becomes hotter, and the full brightness is achieved earlier.
  • alternating operation is preferably used when boosting (for this purpose, those reconnection operations which take place once the two recovery phases have elapsed are counted) such that both lamps are run up simultaneously.
  • the first and the second lamps are then boosted alternately, for example the first lamp is boosted during reconnection operations having an odd number and the second lamp is boosted during reconnection operations having an even number.
  • the luminaire according to the invention is a conventional luminaire having two high-pressure discharge lamps, as is known in the prior art, i.e. a luminaire having an electronic ballast, which may comprise, for example, a microprocessor, the luminaire being connected to a light switch, by means of which it is switched on and off.
  • a luminaire having an electronic ballast which may comprise, for example, a microprocessor, the luminaire being connected to a light switch, by means of which it is switched on and off.
  • the supply voltage of the electronic ballast is usually provided directly via the light switch.
  • an information line is provided according to the invention, which information line is used to transmit information on the switching state of the light switch to the electronic ballast (in particular the microprocessor).
  • the information line can have the supply voltage directly applied to it, for example, with the result that logic one on the information line is defined such that the voltage is present, and logic zero is defined such that the voltage is not present.
  • this information line is an additional line which has the name information line because it is used exclusively for transmitting information and not for transmitting power.
  • the electronic ballast is designed (i.e. for example its microprocessor is programmed) to determine the number of switch-on operations of the luminaires once a predetermined minimum period of time from the preceding switch-off operation has expired. As a result, the electronic ballast can establish whether this number is an even number or an odd number and, on the basis of this, the first lamp or the second lamp can be boosted in order to switch on the luminaire more quickly.
  • FIG. 1 shows a schematic of the luminaire according to the invention in the switched-on state
  • FIG. 2 shows a schematic of the luminaire according to the invention, once it has been switched off, in the standby mode
  • FIG. 3 shows a schematic of the luminaire according to the invention in the switched-off state
  • FIG. 4 shows a schematic of the luminaire according to the invention directly after it has been switched on
  • FIG. 5 shows the method according to the invention in a schematic chart.
  • the luminaire shown in FIGS. 1 to 4 comprises an electronic ballast 10 , which may comprise a microprocessor (not shown), and two high-pressure discharge lamps 12 a and 12 b .
  • the luminaire according to the invention includes a light switch 14 , which is illustrated as being switched on in FIG. 1 .
  • the electronic ballast 10 drives the two lamps 12 a and 12 b , as is illustrated by the arrows, and these two lamps 12 a and 12 b are switched on and output light (illustrated schematically).
  • the invention can also be applied to a pair of luminaires comprising physically adjacent luminaires which each comprise one of the lamps 12 a and 12 b .
  • the common ballast 10 and one common light switch 14 are essential.
  • the method according to the invention begins, in accordance with FIG. 5 , with the light switch being switched off.
  • the first lamp in this case the lamp 12 a
  • the second lamp continues to be operated in the standby mode for a standby period of time T.
  • FIG. 2 which shows that, despite the fact that the switch 14 is switched off, the electronic ballast 10 still drives the lamp 12 b (indicated by the dashed arrow), and this lamp 12 b still outputs light.
  • FIG. 2 illustrates the fact that the lamp 12 b outputs less light than in the switched-on state, as shown in FIG. 1 , i.e. it is dimmed in comparison with this state.
  • the standby mode does not necessarily need to be associated with dimming; it is also possible for the lamp 12 b to define its normal operating state as the standby mode.
  • the lamp may also be driven in pulsed fashion by the electronic ballast and flicker.
  • FIG. 3 The situation of the switched-off lamp is shown in FIG. 3 .
  • the switch 14 is at OFF, and the electronic ballast 10 does not output any control pulses to the lamps 12 a and 12 b , which correspondingly output no light.
  • there is initially a wait for the second period of time T i.e. the previously dimmed lamp 12 b likewise needs to recover in order to be immediately capable of starting. Once this period of time has expired, both lamps are ready to start.
  • the electronic ballast 10 counts the switch-on operation. If the number of switch-on operations is odd, the first lamp is boosted, and the second lamp is run up normally.
  • the situation shown in FIG. 4 results: the second lamp is boosted (illustrated by second drive arrows from the electronic ballast 10 to the second lamp 12 b ), and the first lamp 12 a is run up normally (illustrated by only one drive arrow).
  • the luminaire according to the invention has four states, namely two on states and two off states, in which case it is only half switched off in one off state and completely switched off in the other off state and only half switched on in one on state and completely switched on in the other on state.
  • the invention is based on the knowledge that one of two luminaires already provides sufficient light for it to be possible for an on state of the luminaire to be defined.
  • an operator therefore only produces the off state in order that the on state does not last any longer. He therefore generally does not desire darkness such that it is of no further consequence if, in the preliminary off state, one of the two lamps (see lamp 12 b in FIG. 2 ) is still illuminated in the standby state.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
US11/990,114 2005-08-30 2006-08-29 Method for operating high-pressure lamps without hotstarting and luminaire having two high-pressure discharge lamps Expired - Fee Related US7859192B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102005041075 2005-08-30
DE102005041075.8 2005-08-30
DE102005041075A DE102005041075A1 (de) 2005-08-30 2005-08-30 Verfahren zum Betreiben von Hochdrucklampen ohne Heisszünden und Leuchte mit zwei Hochdruckentladungslampen
PCT/EP2006/065789 WO2007025974A1 (de) 2005-08-30 2006-08-29 Verfahren zum betreiben von hochdrucklampen ohne heisszünden und leuchte mit zwei hochdruckentladungslampen

Publications (2)

Publication Number Publication Date
US20090295308A1 US20090295308A1 (en) 2009-12-03
US7859192B2 true US7859192B2 (en) 2010-12-28

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US11/990,114 Expired - Fee Related US7859192B2 (en) 2005-08-30 2006-08-29 Method for operating high-pressure lamps without hotstarting and luminaire having two high-pressure discharge lamps

Country Status (9)

Country Link
US (1) US7859192B2 (de)
EP (1) EP1920641A1 (de)
JP (1) JP2009506508A (de)
KR (1) KR20080047580A (de)
CN (1) CN101253816B (de)
CA (1) CA2620245A1 (de)
DE (1) DE102005041075A1 (de)
TW (1) TW200718286A (de)
WO (1) WO2007025974A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013132623A1 (ja) * 2012-03-07 2013-09-12 Ｎｅｃディスプレイソリューションズ株式会社 投写型表示装置およびその制御方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535271A (en) 1976-07-26 1985-08-13 Wide-Lite International High frequency circuit for operating a high-intensity, gaseous discharge lamp
US4700110A (en) * 1986-05-05 1987-10-13 Rhett McNair Lamp switching
US4888494A (en) * 1987-11-02 1989-12-19 Mcnair Rhett Electromechanical lamp switching
US5111114A (en) 1991-06-18 1992-05-05 L.P.S. Technology Co., Ltd. Fluorescent lamp light ballast system
US5677601A (en) 1994-08-26 1997-10-14 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Operating circuit for low-power low-pressure discharge lamps, particularly compact fluorescent lamps
US5821700A (en) * 1996-12-20 1998-10-13 Star Headlight & Lantern Co. Visual warning system for a railway vehicle
US6091208A (en) 1999-03-30 2000-07-18 Hubbell Incorporated Lamp ignitor for starting conventional hid lamps and for starting and restarting hid lamps with hot restrike capability
GB2360150A (en) 2000-03-10 2001-09-12 Microlights Ltd Lighting a plurality of dishcarge lamps
US20030080694A1 (en) 2001-10-26 2003-05-01 Collins Byron R. Ballast circuit with an ignitor for starting multiple HID lamps
US6731080B2 (en) * 2002-06-28 2004-05-04 Hubbell Incorporated Multiple ballast and lamp control system for selectively varying operation of ballasts to distribute burn times among lamps

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535271A (en) 1976-07-26 1985-08-13 Wide-Lite International High frequency circuit for operating a high-intensity, gaseous discharge lamp
US4700110A (en) * 1986-05-05 1987-10-13 Rhett McNair Lamp switching
US4888494A (en) * 1987-11-02 1989-12-19 Mcnair Rhett Electromechanical lamp switching
US5111114A (en) 1991-06-18 1992-05-05 L.P.S. Technology Co., Ltd. Fluorescent lamp light ballast system
US5677601A (en) 1994-08-26 1997-10-14 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Operating circuit for low-power low-pressure discharge lamps, particularly compact fluorescent lamps
US5821700A (en) * 1996-12-20 1998-10-13 Star Headlight & Lantern Co. Visual warning system for a railway vehicle
US6091208A (en) 1999-03-30 2000-07-18 Hubbell Incorporated Lamp ignitor for starting conventional hid lamps and for starting and restarting hid lamps with hot restrike capability
GB2360150A (en) 2000-03-10 2001-09-12 Microlights Ltd Lighting a plurality of dishcarge lamps
US20030080694A1 (en) 2001-10-26 2003-05-01 Collins Byron R. Ballast circuit with an ignitor for starting multiple HID lamps
US6731080B2 (en) * 2002-06-28 2004-05-04 Hubbell Incorporated Multiple ballast and lamp control system for selectively varying operation of ballasts to distribute burn times among lamps

Also Published As

Publication number Publication date
EP1920641A1 (de) 2008-05-14
JP2009506508A (ja) 2009-02-12
TW200718286A (en) 2007-05-01
DE102005041075A1 (de) 2007-03-01
CN101253816A (zh) 2008-08-27
CN101253816B (zh) 2011-11-02
US20090295308A1 (en) 2009-12-03
WO2007025974A1 (de) 2007-03-08
KR20080047580A (ko) 2008-05-29
CA2620245A1 (en) 2007-03-08

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